Following the recent price increases of original ink cartridges, refilling is becoming more popular again. We regularly get asked how to refill Canon PGI-550 BK CLI-551 BK/C/M/Y used in the Canon Pixma MG5550, MG5650, iP7250, MG5400, MG6300, MG5450, MG6350, MX725, MX925 printers. Although the above is a workable solution we do not recommend the below method of refilling the ink in your printer. The original Canon cartridges are not designed to be refilled and can be messy to do so. We recommend you use special refillable cartridges that contain auto reset chips. However if you are determined to refill your...